spray/spray — pull request #227 by nevang (2013-02-27 19:02:34+00:00)
Title: Stops optionalCookie directive generating MissingCookieRejection

optionalCookie directive was based on cookie directive and in case of a missing cookie it was generating a MissingCookieRejection. In case you expect an optional value such rejection is misleading and and complicates rejection handling.